Durability classes wood

Natural durability is the resistance of the heartwood of a wood species to wood-destroying organisms or wood pests (e.g. fungal or insect attack). DIN EN 350 provides various durability classes for wood and classifies the most important types of wood into these classes. However, each wood-destroying organism is considered differently, as each type of wood has a certain durability against different wood pests.

DIN 68800-1:2011-10 contains further wood species and their natural durability. In addition, there are minimum requirements for durability with regard to the use of certain types of wood in various use classes (DIN EN 335). These depend on the installation situation and the associated stress caused by insect or fungal attack as well as the prevailing ambient and wood moisture content.

Exemplary is the use class GK 0 for wood installed indoors, which is permanently dry and does not allow any attack by insects.